What is the initiating event that leads to the development of atherosclerosis?
Injury to the endothelial cells that line the artery walls
Release of the platelet-deprived growth factor
Macrophages adhere to vessel walls
Release of the inflammatory cytokines
The Correct Answer is A
A. Injury to the endothelial cells that line the artery walls: The development of atherosclerosis begins with damage to the endothelial cells of the arterial wall. This injury can be caused by various factors, including hypertension, smoking, high cholesterol, and diabetes. Once the endothelium is injured, it becomes more permeable, allowing lipids and inflammatory cells to penetrate and accumulate, leading to the formation of atherosclerotic plaques.
B. Release of the platelet-derived growth factor: While platelet-derived growth factor (PDGF) plays a role in the proliferation of smooth muscle cells and the progression of atherosclerosis, it is not the initiating event. PDGF is released in response to endothelial injury and inflammation but does not cause the initial damage itself.
C. Macrophages adhere to vessel walls: The adherence of macrophages to the vessel walls occurs after the initial endothelial injury. Once the endothelium is damaged, macrophages migrate to the site and contribute to the inflammatory response and plaque formation, but this is not the initiating event.
D. Release of inflammatory cytokines: Inflammatory cytokines are part of the response that follows endothelial injury and play a role in the progression of atherosclerosis. However, the release of these cytokines is a consequence of the initial injury rather than the initiating event.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Veins that are most susceptible to a deep vein thrombosis are the peroneal, posterior tibial, popliteal and superficial femoral: This statement is correct. These veins are indeed among the most common sites for the development of DVT.
B. DVTs tend to mostly occur in the lower extremities but can occur in the upper extremities too: This statement is also correct. While DVTs primarily occur in the lower extremities, they can occur in the upper extremities as well, particularly in individuals with risk factors such as central venous catheters or certain medical conditions.
C. A DVT is a type of venous thromboembolism (VTE), which is a blood clot that starts in the vein: This statement is correct. DVTs are indeed classified as venous thromboembolism, which refers to blood clots that form in the venous system.
D. A deep vein thrombosis in the lower extremity has a low probability of becoming a pulmonary embolism: This statement is incorrect. A deep vein thrombosis in the lower extremity has a significant risk of becoming a pulmonary embolism if a thrombus dislodges and travels to the pulmonary circulation. It is essential to monitor and treat DVTs to reduce the risk of complications like pulmonary embolism.
Correct Answer is C
Explanation
A. Fungus: While fungal infections can cause infective endocarditis, they are much less common compared to bacterial infections. Fungal endocarditis typically occurs in immunocompromised individuals or those with specific risk factors.
B. Virus: Viral infections can affect the heart, but they are not a common cause of infective endocarditis. Most cases of endocarditis are associated with bacterial infections rather than viral ones.
C. Bacterium: The most common cause of infective endocarditis is bacterial infection. Bacteria, particularly Staphylococcus aureus, Streptococcus viridans, and Enterococcus, are frequently implicated in this condition. These bacteria can enter the bloodstream and adhere to heart valves or damaged cardiac tissue, leading to infection and inflammation.
D. Rickettsiae: Rickettsial infections are caused by a specific type of bacteria that are typically transmitted through arthropod vectors, such as ticks. While they can cause various illnesses, they are not a common cause of infective endocarditis.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.